<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>arguments</title>
    <script type="text/javascript">
        function fun() {
            console.log(arguments.length);
            console.log(arguments[0]);

            console.log(arguments.callee == fun);
        }

        fun("hello", true);

    </script>

</head>

<body>

</body>

</html>